Engineering - March 2007

why some country have 240 v ac

2007-03-22 22:59:27 · 3 answers · asked by anami_mahanta 1

2007-03-22 22:49:21 · 3 answers · asked by sumit 1

2007-03-22 22:25:01 · 1 answers · asked by Anonymous

2007-03-22 22:23:28 · 3 answers · asked by erkapil_421 1

2007-03-22 22:22:25 · 4 answers · asked by erkapil_421 1

Could you please mention about abrivations generally using in the engineering construction sites or projects like EPC, PMC, FEED etc.

2007-03-22 20:44:56 · 6 answers · asked by jayancjaa 1

HAVE BEEN ADVISED THAT DC SYSTEMS SOULD BE POSITIVELY GROUNDED, AS OPPOSED TO NEGATIVE. THE THREE ITEMS THAT NEED TO BE POSITIVELY GROUNDED ARE PANEL, BATTERY AND LOAD. AM I CORRECT IN THINKING THAT THE POSITIVE TERMINALS OF THESE THREE ITEMS SHOULD BE CONNECTED TO THE SAME GROUND STAKE?

THANKING YOU IN ANTICIPATION

2007-03-22 20:41:15 · 5 answers · asked by Anonymous

Explain why although under no load a motor that spins at a speed below synchronous speed(1500rpm - for 4 pole motor supplied at 50Hz). Why is this effect more pronounced than what should normally be expected?

2007-03-22 20:09:43 · 2 answers · asked by AlexTan 3

What exactly is an electrical contactor?
Can a three pole contactor be used in a single phase circuit?

2007-03-22 19:17:30 · 4 answers · asked by pmi 4

2007-03-22 17:55:20 · 5 answers · asked by harry s 1

operate a radio or tv off of a car battery? Ive seen it done...and Im curious about the logistics behind it. can a window air conditioner run off a car battery as well? how can i keep myself and pets cool without electricity? what light source can i utilize besides batteries?

thanks!

2007-03-22 17:28:06 · 4 answers · asked by rcmoonpie1967 2

2007-03-22 17:24:05 · 1 answers · asked by norman s 1

2007-03-22 16:42:16 · 3 answers · asked by Anonymous

Hi. A relative of mine is in charge of a decommissioned soviet sub base and is looking to sell on some of the junk. I am not a scientist and don't know plutonium from uranium, but have always wanted to build a home power plant, so I dont have to worry about electricity bills. I posted a similar question a couple of days ago, and was told this was almost impossible, as building a reactor in a one bedroom flat is probably impossible, unless your Mcgiva, and I am not.

However. I have been assured that I can get loads of weapons grade uranium at a next to nothing price. He wants to move to south america and just wants enough to buy a villa. I doubt it is a scam as he is a close relative and I know for certain that he works there.

Someone advised buying the stuff and selling it on at a later date. All well, but where would I sell? I don't know anyone who knows anyone that will be interested in weapons grade uranium and I can't exactly sell the stuff on ebay can I? Story of my life:(

2007-03-22 16:26:11 · 6 answers · asked by Anonymous

hi guys,

does anyone know if it is at all possible to convert from watthours to watts?
see i have this data which looks like:


timestamp watthour
"2004-01-01 00:30:00"; 74340
"2004-01-01 01:00:00"; 73584
"2004-01-01 01:30:00"; 74124
"2004-01-01 02:00:00"; 74124
"2004-01-01 02:30:00"; 73944
"2004-01-01 03:00:00"; 74196
"2004-01-01 03:30:00"; 73692
"2004-01-01 04:00:00"; 74376
"2004-01-01 04:30:00"; 73656
"2004-01-01 05:00:00"; 72720
"2004-01-01 05:30:00"; 72828
"2004-01-01 06:00:00"; 75888


etc for a couple of years

and i need to calculate 2 things:
1) the maximum demand in a billing period, which is given by
a charge per day of 30.00¢ per kw

2)find the maximum demand recorded in a particular month and calculate a cost using $22.91 per kW

Will i be able to work out these with this kind of data?
cheers.
vanessa

2007-03-22 16:17:45 · 4 answers · asked by Anonymous

The drain is L Shaped. The pipe is approx 3' in diameter. The hole is at the bottom of the vertical leg of the "L" so eventually the pond level will be down to the Horizontal leg of the "L". The hole may have been caused from the constant water flowing over into the drain, dropping vertically, and flowing out horizontally.

2007-03-22 16:17:31 · 5 answers · asked by Robert A 2

Is there an advantage to having 240 versus 120 volts AC house current?

2007-03-22 15:48:06 · 9 answers · asked by rann_georgia 7

pictures would help if you can

2007-03-22 15:35:47 · 3 answers · asked by Cynthia E 1

what are those big machines that are like chain reaction for example ball rolls down hits a car car goes forward pulls a string another ball drops rolls around hits a panel that turns on a fan. something like that what are they called i cant remember

2007-03-22 15:19:20 · 5 answers · asked by Brandon 1

I am doing a NASA spinoff project and I must include the biography of those that developed the project. PLEASE HELP!!!

2007-03-22 15:14:59 · 1 answers · asked by LilK 1

lead to the invetion of the TV.

2007-03-22 14:37:38 · 4 answers · asked by Anonymous

2007-03-22 14:31:36 · 6 answers · asked by Toby T 1

2007-03-22 14:30:11 · 8 answers · asked by Toby T 1

I just spent a 1/2 hour searching for the size of a traffic light and I can't find it anywhere. I want to know how tall they are, and the diameter of the lights (the light as a whole - not a small light in a grouping of lights). Years ago I saw one on the ground being fixed and it looked about 5 feet tall. They look small on the wire up there, but how big are they really?! Please try to provide a source for your answer so that I believe you. Thanks!!

2007-03-22 14:03:04 · 6 answers · asked by ? 6

while pushing a dimmer used for fans into the outlet box i pinched one of the wires comming off the dimmer... after shorting out the dimmer i took it apart to see if i burned out a resistor ...which i hadnt but noticed that there was a burn mark on a piece of the dimmer which im not sure what its called.... but it says +10% -5%.......the dimmer no longer works properly as it only turns the fan very slowly..... how can i test to see where the propblem is in the dimmer

2007-03-22 13:51:51 · 2 answers · asked by Anonymous

of the formula is like this..
m= 50 kg
i think sth is wrong wit this excercise... but can u help me?

2007-03-22 13:46:20 · 4 answers · asked by frog 4

2007-03-22 13:35:43 · 2 answers · asked by Anonymous

2007-03-22 13:27:07 · 3 answers · asked by Scott R 1

i would like to have a brief answer in form of note on it

2007-03-22 13:22:56 · 1 answers · asked by ifeanyi o 1

Does anyone know what brand of (number 33) rubber band company sells the strongest/has the most elastic potential energy?
I need a very elastic rubber band that can stretch very far with out breaking.
So far i've only found one that can be stretched 700% of its length.
Does anyone know a brand that can stretch even farther?

2007-03-22 12:42:53 · 1 answers · asked by Bobo 2